<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./demo.css">
</head>
<body>
    <div class="yeye">
        我是爷爷
        <div class="baba">
            我是爸爸
            <ul class="son">
                我是儿子
                <li class="sunzi">强哥</li>
                <li class="sunzi">大嫂</li>
                <li class="sunzi">泰叔</li>
                <li class="sunzi">老墨</li>
            </ul>
        </div>
    </div>
</body>
</html>